Permutation-pad lock



( No Model.)

W. E. HULLINGER. PERMU'I'ATION PLADLOUK.

No. 536,285. Patented Mar. 26, 1895.

WITNESSES; INVENTOI? UNITED STATES PATENT OFFICE.

-WILLIAM It. HULLINGER, OF CHICAGO, ILLINOIS.

PERM UTATlON-PADLOCK.

SPECIFICATION forming part of Letters Patent N 0. 536,285, dated March 26, 1895.

Application filed December 12, 1894. Serial No. 531,538. (No model.)

.To all whom it may concern:

Be it known that 1, WILLIAM E. HULLINGER, of Chicago, county of Cook, State of Illinois, have invented a new and useful Improvement in Permutation-Locks; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to new and useful improvements in permutation padlocks, and has for its object to provide a simple mechanism yet one having the capacity to successfully withstand attempts at opening other than by a familiarity with the combination, and a further object of the invention is to provide a lock in which are combined both cheapness of construction, and neatness.

The invention will be fully described in the I following specification, and speci fically set out in the claim.

Figure 1, is a vertical section through the case, and permutation wheels, the hasp shown in full; Fig. 2, a view of the hasp removed from the case; Fig. 3, a side elevation of the lock, showing the numerals on one set of the permutation wheels, through one of the openings in the case.

(a) designates the case which is provided with two cylindrical chambers (b) and (b), one on each side, and which open through the sides of said casing as shown in Fig. 3.

(c) is a cap secured to the case by a screw (d) that penetrates the solid portion of the case midway between the two chambers. The head of said screw is seated in a counter-sunk opening 0' in the cap (0). The cap (0) is also provided with circular openings (0) having each a diameter equal to the greatest diameter of the prongs of the hasp (f). Said cap has further, a counter-sunk opening (6) of a size and shape corresponding to the plate (g), and in which said plate fits, and registers flush with the upper surface of said cap, as at (i). The hasp also passes through openings in this plate, and the object of said plate is to conceal the head of the screw (d) and thereby prevent the insertion of a screw-driver or other tool by persons seeking to unlawfully open the lock. The hasp (f) is provided with prongs (f) of a less diameter than the remaining parts, around which the permutation wheels are placed. Projecting from said prongs, are lugs (h), two of which are preferably on one prong.

(0) and (p) designate, respectively, permutation wheels of which there are six, three on each side of the case. Of these permutation wheels there are three that are deceptive; that is, they have no functions in the combination, and aredesigned merely as a blind. These are designated by the letter (p), and occupy positions in the chambers as shown in Fig. 1 They are provided with numerals on their peripheries from 1 'to O, as are also, the wheels (0). Thus it will be seen that the opening of the look does not depend upon the positions of these blinds, and of this fact no one is supposed to be aware except those who are f on to the combination. The wheels (0) on which the Working numerals'are placed may be placed in any relative positions desirable. In the present instance, the combination consists of 7 and 4, the former numeral appearing on the wheel (0) which is located between wheels (p)(p) in chamber (1)), while the latter numeral appears at the bottom in chamber (b).

Of course I do not desire to convey the impression that the employment of permutation wheels is new in looks of this class, for such have in fact been employed in various ways, but

What I claim as new is- In a permutation padlock, a case having chambers (b) and (b') and a central screwthreaded opening; adetachable cap c having a central screwthreaded and counter sunk opening through which a screw is adapted to pass to secure said cap to the case; said cap alsohaving a recess (e) in its upper surface; a plate (g) adapted to occupy said recess and lie flush with the upper surface of the cap; a hasp adapted to penetrate openings in said cap and plate; permutation wheels inclosing the ends of said hasp, substantially as and for the purposes specified.

In testimony whereof I have hereunto. set my hand this 3d day of December, 189i.

WM. HULLINGER.

Witnesses:

L. B. MOI HENNY, R. J. MCOARTY. 

